import java.util.*;

public class Main5 {
    public static void main(String[] args) {
        Scanner console = new Scanner(System.in);
        int price = console.nextInt();
        int cost = 0;

        //write your code here......
        if(price<100){
            cost=price;
        } else if (price<500) {
            cost=(int)(price*0.9);
        } else if (price<2000) {
            cost=(int)(price*0.8);
        } else if (price<5000) {
            cost=(int)(price*0.7);
        }else{
            cost=(int)(price*0.6);
        }
        System.out.println(cost);
    }
}